Pangayacu

Brochis ambiacus, long known as Corydoras ambiacus, is an armoured catfish from the upper Amazon tributaries of Peru, Brazil, Colombia and Ecuador, described from the Río Ampiyacu. Its name is commonly misapplied to similar-looking fishes, particularly B. agassizii, and the colour pattern is variable. Cope described a large black spot covering the front half of the dorsal fin, and fish matching this are far more common in the trade than those matching B. agassizii.